get return value from web service

hi all...

i created a web service which will return value to my website when i pass some parameters to the function in web service......when the return value is normal datatype like string,integer,datatable..... it return successfully....but when i try to return a table....it return me this error.... "The XML element 'EnableTheming' from namespace 'http://tempuri.org/' is already present in the current scope. Use XML attributes to specify another XML name or namespace for the element." ..... may i know what is the error......can i return the whole table ?

 

thanks
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